JEE Advanced · 2009 · 12 Apr 2009 · Paper 2 · Chemical Thermodynamics

Among the following, the state function(s) is(are)

(A)Internal energy✓ Correct
(B)Irreversible expansion work
(C)Reversible expansion work
(D)Molar enthalpy✓ Correct

Answer: (A), (D)

Solution

State functions depend only on the initial and final states of the system, not on the path taken. Internal energy and molar enthalpy are state functions. Work (whether reversible or irreversible) is a path function, not a state function, as it depends on the process by which the change occurs.

JEE Advanced · 2009 · 12 Apr 2009 · Paper 2 · One or more correct options

Practise more: all JEE Advanced PYQs on Chemical Thermodynamics →

More JEE Advanced questions on Chemical Thermodynamics

An ideal gas (0.5 mol), initially at 2 bar pressure, is compressed at a constant temperature of 600 K in two steps : first against a constant external pressure of P bar $(2 < P < 8)$ , and then against constant external pressure of 8 bar. At each step, the compression is st …
JEE Advanced 2026View solution →
List-I contains various physical/chemical processes, and List-II contains combinations of changes in enthalpy $(Δ H)$ and entropy $(Δ S)$ . Match each entry in List-I to appropriate entry in List-II, and choose the correct option.

| List-I | | List …
JEE Advanced 2026View solution →
Considering ideal gas behavior, the expansion work done (in kJ) when 144 g of water is electrolyzed completely under constant pressure at 300 K is ____.

Use: Universal gas constant $(R) = 8.3 J K^{- 1} mol^{- 1}$ ; Atomic mass (in amu): …
JEE Advanced 2025View solution →
Consider the following volume-temperature (V - T) diagram for the expansion of 5 moles of an ideal monoatomic gas.

(see diagram)

Considering only P-V work is involved, the total change in enthalpy (in Joule) for the transformation of state in the sequence …
JEE Advanced 2024View solution →
The entropy versus temperature plot for phases $α$ and $β$ at 1 bar pressure is given.
$S_{T}$ and $S_{0}$ are entropies of the phases at temperatures T and 0 K, respectively.

(see diagram)

The transition temperature for $α$ to …
JEE Advanced 2023View solution →
The entropy versus temperature plot for phases $α$ and $β$ at 1 bar pressure is given.
$S_{T}$ and $S_{0}$ are entropies of the phases at temperatures T and 0 K, respectively.

(see diagram)

The transition temperature for $α$ to …
JEE Advanced 2023View solution →